Now now, don't be like that.
We all know Oda said, 25 years ago, that Sanji is specializing in CoO, zoro in CoA and luffy in CoC. The fact that Luffy by now is a confirmed advanced user in all three types, zoro a confirmed advanced user in CoA and CoC with strong indication of FS doesn't mean ANYTHING. We all know, how accurate Oda is with his statements and we strongly believe he's keeping his words from 25 years ago in his mind every day when he writes the story